AD/B-2/11 - Tail Rotor Blade Retaining Nut - Safetying - CANCELLED

What this does: This document officially cancels a 49-year-old aviation safety rule that required owners of Brantly B-2 series helicopters to install safety wire on tail rotor blade retaining nuts.

Background: The original rule (issued in 1960) mandated a modification to prevent the tail rotor nuts from coming loose. Because this change would have been made to all affected helicopters decades ago, the rule is now redundant.

Impact: This removes an outdated compliance requirement. No action is required by aircraft owners—the cancellation simply recognises that the safety modification has already been universally adopted.